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Method for making a microporous membrane

Active Publication Date: 2010-01-21
NASA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0005]In one embodiment, a method for making a microporous membrane is described. The method comprises the steps of: providing a plurality of carbon nanotubes having a hollow interior with a diameter of 20 Angstroms or less; sonicating the plurality of carbon nanotubes utilizing a solution comprising deionized, distilled water and a surfactant that coats at least one of the p

Problems solved by technology

Materials with high flux tend to also have low selectivity, and vice versa.

Method used

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  • Method for making a microporous membrane
  • Method for making a microporous membrane

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Embodiment Construction

[0012]Exemplary embodiments will now be described with reference to the accompanying drawings or figures. Throughout the drawings, like elements or components are denoted with the same reference characters for consistency.

[0013]Before beginning a detailed description of some exemplary embodiments, the meaning of certain terms as used herein will be given.

[0014]“Macroporous” means having or containing pores with diameters greater than about 50 nm, or about 500 Angstrom.

[0015]“Mesoporous”, such as a “mesoporous material”, means a material containing pores with diameters ranging between about 2 and about 50 nanometers, or about 20 to about 500 Angstrom.

[0016]“Microporous” means having or containing pores with diameters of less than about 2 nm or about 20 Angstrom.

[0017]A filtering apparatus in accordance with the exemplary embodiments of the invention comprises an acoustically driven molecular sieve which filters substances such as a fluid by passing through molecules of a particular s...

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Abstract

A method for making a microporous membrane comprises the steps of: providing a plurality of carbon nanotubes having a hollow interior diameter of 20 Angstroms or less; sonicating the plurality of carbon nanotubes utilizing a solution comprising deionized, distilled water and a surfactant that coats at least one of the plurality of carbon nanotubes; collecting the coated carbon nanotubes; forming a matrix that supports the plurality of carbon nanotubes; embedding the coated carbon nanotubes into the matrix; rinsing the coated nanotubes to remove at least a portion of the surfactant; curing the nanotube-matrix assembly; and cutting the nanotube-matrix assembly to a particular thickness so as to open the ends of the embedded nanotubes. The hollow interiors of the plurality of embedded carbon nanotubes comprise the pores of the microporous membrane.

Description

CROSS REFERENCE OF RELATED APPLICATION[0001]This application is related to U.S. patent application Ser. No. 12 / 167,332, entitled “Filtering Apparatus and Method of Use” filed on Jul. 3, 2008.ORIGIN OF THE INVENTION[0002]The invention described herein was made by an employee or employees of the United States Government and may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.FIELD OF INVENTION[0003]The field of invention relates generally to a method for constructing a microporous membrane used for filtration of fluids. More particularly, the field of invention relates to a method for making a microporous membrane using carbon nanotubes.BACKGROUND OF INVENTION[0004]Separation of substances such as fluids into their constituent parts is of particular interest for many industrial processes. Traditional separation methods for fluids include distillation and absorption. Ano...

Claims

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Application Information

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IPC IPC(8): B01J19/08
CPCB01D63/087B01D2325/48B01D2315/04B01D69/141
Inventor GAVALAS, LILLIAN SUSAN
Owner NASA
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